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JEE Main20199 Apr 2019Morning ShiftChemistryStates of MatterActual

Consider the van der Waal's constants, a and b , for the following gases. Gas A r N e K r X e a / ( a t m d m 6 m o l - 2 ) 1.3 0.2 5.1 4.1 b / ( 10 - 2 d m 3 m o l - 1 ) 3.2 1.7 1.0 5.0 Which gas is expected to have the highest critical temperature?

Options

  1. AK r
  2. BA r
  3. CX e
  4. DN e

Correct answer

A. K r

Step-by-step solution

Critical temperature is :- T C = 8 a 27 R b for K r the value of a b is the highest so, T c for K r will be highest. a b for A r = 1.3 3.2 = 0.406 a b for N e = 0.2 1.7 = 0.118 a b for K r = 5.1 1 = 5.1 a b for X e = 4.1 5 = 0.82

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